Need mower suggestions

I don't post here very often, as I am not in the landscaping business. Been a member for a few years now.I hope this is posted in the right forum. I am a residential and commercial plumber and electrician. Yall have helped me out several times repairing small engines and I thank everyone for that.

I have 3 lawns to mow, in all about 3 acres. There are no fences and the grass is Zoysia, Centipede and St Augustine. There are only a few hills and they aren't very steep. I am in the market for a new mower and need some heads up. I've read a lot of the threads on the different brands, but I would like your input into size and brand. I'm using an old worn out Snapper 30" cut rider and a push mower at this time. It takes about 3 to 4 hours to cut the lawns now,they are not right together. I want a commercial ZTR mower and one that I won't have to buy any more mowers in this lifetime>old guy. I'm 85 miles from Atlanta,Ga. Nearby I have the following dealerships John Deere-25miles away, Gravely/Snapper-15miles, Hustler-60miles,Exmark-50miles. I know the folks at the JD place,(plumbed that building) as I bought a backhoe and farm tractor from them. Also wired the Gravely dealership. These yards are not highly manicured but they require frequent mowing(every 2 weeks) as they are located on a lake where we all use pumps to water the grass. The main features I would care about are cut,manueverability ,easy to maintain,parts etc. I like the idea of the double blades, mulching capibility ,and I could get rid of the bag. I would like sufficent hp and possibly a Kawasaki engine if offered. On the width of cut I'd say 48 to 60 inchs would be nice. I usually like to buy heavy duty machines that will last rather than homeowner junk. I'd like to keep the price around 6500 or less. Any suggestions would be appreciated, and if I can help any of yall out on any plumbing or electrical questions just ask, Thanks, David

I know no one replied before but you should get a 48in hydro. Easy to operate, go up or down anything. I have a great dane which is a John Deere. Tons of bang for the buck. Get a kawasaki engine 17 hp or bigger. Good Luck!